Originally Posted by gerv
Personally, I would shoot for a little redundancy in my lighting. Maybe look into one of those new Planet Bike 2-watt headlights with a Superflash taillight.
Then, especially if you do a lot of night riding or commuting in winter, a brighter, more expensive light. A lot of folks say the MagicShine is pretty nice. Myself, I have an older DIY light that uses a lead-acid battery with a 20 watt halogen light.
+1 to all of this.
I run with two lights up front and two in back, one on steady and one on blinking pattern - day or night.
Is there a particular reason you prefer a helmet mount?
For reliable, year-round use, it is hard to beat a dynamo hub with bright LED's front and rear, supplemented with battery powered blinkies. Works for me.
Since we're in Summer (assuming you are in the northern hemisphere), blinkies would be a good starting point. The Light & Motion 360
has gotten some really great reviews as one of the best "be seen" setups available.
Less expensive bike-mounted options include the venerable Planet Bike Superflash
(now in brighter "Turbo
" flavor) or PDW Radbot 1000
in the rear and the Planet Bike Blaze 2W
up front (which also serves as a decent interim headlight after dark, until you pony up the cash for a more powerful main light).
For the main rig in the darker, colder months, there are many options - battery or dynamo.
I've abandoned my battery setup and am now a dynamo user. I love it.
There are some amazing battery and dynamo lights being produced these days utilizing super-bright LED's. Expect to spend between $125 (Magicshine) to more than $300 for a good headlight system.
If you opt to go with a dynamo, a front wheel built around the excellent Shimano Alfine dynamo hub can be purchased for about $200, and high quality German or Japanese lightsrange from $60 to over $200.
Lighting is a big topic. For now I'd say start with the "be seen" lights, then take your time to see what type of high power lighting system (to "see") might work best for your needs and budget.